Electronic switching system



April s, 1958 Filed March 4, 1955 llo 47 Sheets-Sheet l L LINE CIRCUIT NH] CPII FIG. l3

$ R c125 s M-IZ CPI2 NOTE 5 CONNECTED All DIODE cp SWITCH RP sc F|G.l4

A12 DIODE CPIZ SWITCH R;

A Bll DIODE SWITCH s? Bl2 DIODE gz' SWITCH 4 INVENTOR.

GEORGE ELLIOTT AGENT April Filed March 4, 1955 47 Sheets-Sheet 2 LINK A All L'NK /|3A MULTIPLE TONES OUT POINT FIG. l4

RP |4A\ RELEASE RELEASE LINE 2,; Rp PULSE PULSE A54 F'NDER NFG AMPLIFIER GENERATOR ASH FCT FIG.I8 FIG. I?

A k m A lsA LG 4 x SWITCH CONTROL MP A LB POSITIVE UNITS FIG. 9 1 POSITIVE TENS.

RDP ASl-A AL-A FB LINK B I TONES OUT BIZ MULTIPLE POINT RP 14B I l7B Rs RP RELEASE RELEAsE UNE PULSE PULSE FlNDER ASI B AMPLIFIER GENERATOR FCT r M A A ,I6B LB MPX SC- SP' POSITIVE UNITS SWIICH CONTROL POSITIVE TENS LG RDP ASl-B AL-B FB LG April 8, 1958 G. ELLIOTT 2,830,125

ELECTRONIC SWITCHING SYSTEM Filed March 4, 1955 47 Sheets-Sheet 3 ASI-'A LINK ALLOTTER CIRCUIT DIAL TONE TONE FIG. l2

CONNECTOR PTH ECI

FIGS.

33-4l INCL AUXILIARY PULSE AMPLIFIER FIG.9

ABP

POS. UNITS BUSY LEAD CONVERTER 8 EMERGENCY SERVICE NUMBER FIGS. IO 8 Il TONE TONE

D TENS coNNEcTo NEG. TENS NEG. UNITS CBI 2 B CONNECTOR BUSY AMPLIFIER FIG.I8

FINDER BUSY AMPLIFIER FIG. IO

April s, 1958 Filed March 4, 1955 G. ELLIOTT ELECTRONIC SWITCHING SYSTEM 47 Sheets-Sheet 5 LINK C A ,Isc cII LINK MULTIPLE 4 TONES OUT 02 POINT I4C\ l RP |5C- R5 RP RELEAsE RELEAsE As LINE =RA PuLsE PuLsE 4 FINDER ff i AMPLIFIER GE ERATOR E /|6C IIIII PM I MPX Sc SWITCH L5 Pos.uNITs 4 SPI POS.TENS

CONTROL LG RDP ASl-C AL-C ./25 F8 MuLTIPLExER MPX AMPLFIER F'GT/ RINGING CONTROL 127 RC DRIVER FIG. I4

\NEG. ,IPos. NEG. A TENS TENS UNITS P08. UNITS I A RDP N rI|2|3H PTIIZISIVOI NUIIZIBH Pullzlsro l SP REGISTER TENS RING UNITS RING sAMPLING DRIVE AMPLIFIER AMPLIFIER PULSE L' EF CIRCUITS -cIRcuITs AMPLIFIER 35 FIG.24 FIG.23 FIG.22 -29 FIG.3| I 33 I II III 3 I? IIIIIII ISPD IIIIP 34- 32 so- N E S L TENS RING UNITS RING 'EF Q INPUT PULSE RED CIRCUIT TED cIRcuIT GENERATOR URD UNITS RING FIGs. DRIVE 4 24 8'30 FIG. 23 FIG.22 H62 April 8, 1958 G. ELLIOTT 2,830,125

ELECTRONIC SWITCHING SYSTEM Filed March 4, 1955 47 Sheets-Sheet 6 AL TONE TONE NTH

CON N ECTOR ECI POS. TENS TRUNK HUNTING EXECUTIVE EXECUTIVE CUT 1 CUT IN AMPLIFIER MARKERS FIG.26

TRUNK HUNTING AMPLIFIER FIG.26

MASTER OSCILLATOR FIG. 2|

FIG. 6

Apnl 8, 1958 G. ELLIOTT ELECTRONIC SWITCHING SYSTEM 47 Sheets-Sheet '7 Filed March 4, 1955 April 8, 1958 G. ELLIOTT 2,830,125

ELECTRONIC SWITCHING SYSTEM Filed March 4. 1955 47 Sheets-Sheet s AUXlLlARY PUI SE AMPLIFIER 2O CD902 TQIO LB c090: V

SWITCH CONTROL ISA I L AMPLIFIER LBR CD904 LG f f SPI SC FIG.9

April 8, 1958 G. ELLIOTT 2,830,125

ELECTRONIC SWITCHING SYSTEM Filed March 4, 1955 47 Sheets-Sheet 9 BUSY LEAD CONVERTER 4 EMERGENCY SERVICE NUMBER CIRCUIT 2| ABP REGEN ERATIVE AMPLIFIER RIOO4 TIOSO F3 LBR EMITTER FOLLOWER April 8, 1958 G. ELLIOTT 2,830,125

ELECTRONIC SWITCHING SYSTEM Filed March 4. 1955 47 Sheets-Sheet 1o BUSY LEAD CONVERTER BI EMERGENCY SERVICE NUMBER CIRCUIT 2| I CDIIOI[ STA QUARTER couoz I .5 Lk I DECK STATION I LINE CIRCUlT 03 STA EMERGENCY T E L 225 SERVICE R 0 PILOT HOUSE LINE CIRCUIT STATION sTATzlgg N0. LINE CIRCUIT 25 n05; swITcI-I POSITION pus [Pm z f gfIZRTER DECK PTZ PTO a: PILOT HOUSE I 1 TENS A POS.UNITS EMERGENCY SERVICE NUMBER. RDP

SWITCH II00 I ABP I MPX H ARTIFICIAL FB BUSY $WlTCHES- I 0 called I o-PU5 a O-PU6 PU? AsI-A PUE Pos.uNITs 4 32 RIIOI T UNITS SELECTOR D I IIIO *CDIIO? PT3 I PTI PO$.TENS

PTS

'April 8, 1958 G. ELLIOTT 2,830,125

ELECTRONIC SWITCHING SYSTEM Filed March 4. 1955 47 Sheets-Sheet 11 L INK ALLOTTER CIRCUIT l9 MAN UAL STEP RING STAGE I RING STAGE 2 v RING STAGE 3 FIG. l2

RING c M ||c3 R|302 R|304 SWITCH so, "c2 CIRCUITIIC April 1958 G. ELLIOTT 2,830,125

ELECTRONIC SWITCHING SYSTEM Filed March 4, 1955 47 Sheets-Sheet 12 LINE CIRCUIT lI llc| c Wf a Hu llu2 Ilbl

TO DIODE llb3 SWITCH CIRCUIT IIB |Ib2 llcl 1345 T0 DIODE SLEEVE Tl350 Rl3l0 man M H RING r-W 1L TIP 135i c1305 I3IO I;

RINGING 21R; CONTROL I300 R|309 OSCILLATOR RINGING I320 CONTROL GATE CPII co|304 CDI303 Rma CD|305 RI3I2 RC s iRRP RTP April 1958 G. ELLIOTT 2,830,125

ELECTRONIC SWITCHING SYSTEM Filed March 4, 1955 4'7 Sheets-Sheet 13 mom; LINK SWITCH ClFiCUlT HA MULTIPLE POINT |3A I I\| H402 'ITONES VI 7 co|4o| ICMOI 7: 7 co|4o2 1\| V] v u v R|402 NOTE! OUTPUTS OF ALL I00 W DIODE SWITCH mom: CIRCUITS N L1|':K A" I CONNECT o ESE TERMINALS CONTROL a CPU Mll RINGING CONTBOL DRIVER -27 RC AMPLIFIER u IF C 1404 SPI April 8, 1958 G. ELLIOTT ELECTRONIC SWITCHING SYSTEM 47 Sheets-Sheet 14 Filed March 4, 1955 CHANNEL PULSE MATRIX 26 NEG.

UNITS NTI NEG TENS R NT2 NEG.UNITS Mll LR FIG. I5

TQNES OUT POS. UNITSj April 1958 G. ELLIOTT 2,830,125

ELECTRONIC swxwcnme SYSTEM Filed March 4, 1955 v I 47 Sheets-Sheet 16 NEGLTENS NEG.UNITS MULTIPLEXER OUTPUT AMPLIFIER 25 L. MPX

AMPLIFIER I700 CDI70I RELEASE PULSE GENERATOR I5A ASTABLE OSCILLATOR As RI70| 20 I732 -o vv ZSCDWOZ c|1o|= TONES our P0$.UN|T$- L SP I" RP P0S.UNITS POS.TENS

April 1958 G. ELLIOTT 2,830,125

ELECTRONIC SWITCHING SYSTEM Filed March 4, 1955 I 47 Sheets-Sheet 17 -'POS.TENS

MPX

RELEASE PULSE AMPLIFIER I4A A f FBI naao AL-A MPX LG Rl802 RP coleol YTONES ou1 --Pos. UN|TS\ P05. 'rzus ASl-A RP I /CB/LG' RDP April 8, 1958 G. ELLIOTT 2,830,125

ELECTRONIC SWITCHING SYSTEM Filed March 4, 1955 47 Sheets-Sheet 18 LINE FINDER ITA REGISTER UNITS DRIVE REGISTER PULSE PULSER GATE) I960 Rlgog UNITS REGISTER UNITSZ UNITS 0 7 7 CDI907 coIsoa P0S.UN|TS I/ CDISIO Pos.TENs,,

IN GATE TH R glG 0'5 AMPLIFIER START R\93 THROUGH msoz Cl90 HOLD -II- cIsos 905 CISOB ALLOTTER Ri907 I START I95OA A5 ALLOTTER R START 1950s I ASl-A NFG-'- FRA-- AsI-A I April 8, 8 v I 2 G. ELLlOTT 2,830,125

ELECTRONIC SWITCHING SYSTEM Filed March 4, 1955 47 Sheets-Sheet 19 TENS LINE FINDER ITA REGISTER PULSER 2000 O RZOOI TENS REGISTER r L c200| c2002 H Rzo-oz ,TENSI Tens 2 TENS o R2003 K] 002002 N I R2009 I PTI POS-TENS PT2 00200325 PTO 1 FINDER GATE AMPLIFIER FINDER R2005 T2060 CD2OO4 PULSE GATE b fg 2061 NFG FCT

FIG. 20

April 8, 1958 G. ELLIOTT 7 2,

ELECTRONIC SWITCHING SYSTEM Filed March 4, 1955 47 Sheets-Sheet 20 "I RRP RTP MASTER v OSCILLAIOR 28 UNITS RING PRIVE .43

2 5o ZIOO RZIOB 5:: RZIIZ CLIPP R CZIOI== 6j5 J ZISOE c2|oh 

